Geophysical Data Purchase and Survey Sourcing

al Data Purchase & Survey Sourcing (GDPSS) program. Purpose: The National Geospatial-Intelligence Agency (NGA) provides timely, relevant, and accurate GEOINT in support of national security. NGA also creates the Earth Gravitational Model (EGM) and other gravity products used in navigation products f

or the DOD and general use for industry and academia. The Earth Gravitational Model (EGM) contains gravity survey data from all over the world. Acquiring more gravity data, as well as other geophysical data improves this model. NGA is alway